CN110332234A - The control method and application system of power amplifier of magnetic bearing switch - Google Patents
The control method and application system of power amplifier of magnetic bearing switch Download PDFInfo
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- CN110332234A CN110332234A CN201910489754.0A CN201910489754A CN110332234A CN 110332234 A CN110332234 A CN 110332234A CN 201910489754 A CN201910489754 A CN 201910489754A CN 110332234 A CN110332234 A CN 110332234A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
- F16C32/0451—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a kind of control method of power amplifier of magnetic bearing switch and application systems, wherein method includes the following steps: calculating the duty cycle information for obtaining H bridge driving signal according to pre-set control algorithm；The duty cycle information of H bridge driving signal is compared with default value, to determine the requirement of coil current response speed；It requires control electronic switch to access power module according to coil current response speed, busbar voltage is adjusted.This method has been taken into account under nominal situation by introducing the real-time handoff functionality of busbar voltage to the requirement under the low switch noise requirements and unusual service condition of magnetic bearing switch power amplifier to its high current response speed.
Description
Technical field
The present invention relates to power amplifier techniques field, in particular to a kind of controlling party of power amplifier of magnetic bearing switch
Method and application system.
Background technique
Power amplifier of magnetic bearing switch is used to coil current voltage instruction being converted to actual coil working electric current,
Performance directly affects magnetic bearings control precision.Close power amplifier includes binary states power amplifier and tri-state power amplifier, and tri-state power amplifier is because of its electric current line
Wave is small, and application is more universal.
As shown in Figure 1, common full-bridge type switch power amplifier (hereinafter referred to as close power amplifier) H bridge in magnetic bearing system
Circuit topology forms H bridge by Q1, Q2, Q3, Q4, and L is the equivalent inductance (negligible resistance) of magnetic bearing electromagnet coil, bus
Power supply is U, and the capacitor being connected in parallel in busbar voltage is C.By controlling Q1, Q2, Q3, Q4 on-off, can make to be loaded into electromagnetism iron wire
The voltage at circle both ends changes, and then controls the electric current by coil.It is positive, is denoted as from A point to B point electric current in definition figure
iAB, the voltage between A and B two o'clock is uAB。
Q1~Q4 is controlled by power amplification controller, and power amplification controller acquires current command signal and coil current signal, according to
The two deviation exports the switch state of four switching tubes on PWM wave control full-bridge.Changed by the switch motion of high frequency time and is applied
Equivalent voltage at coil both ends, power amplification controller can achieve the purpose for increaseing or decreasing coil current, finally enable coil electric
It flows consistent with current-order.H bridge works under three kinds of states, and particular state is as follows:
State 1: electric current increases
Q1 and Q4 is connected, Q2 and Q3 cut-off, DC bus power supply U is loaded into coil both ends to line by Q1 and Q4 at this time
Circle charges, and electric current quicklys increase in coil, ignores tube voltage drop, the voltage u being loaded on coilAB=U.
State 2: electric current reduces
End Q1 and Q4, Q2 and Q3 conducting, DC bus power supply U is loaded into coil both ends by Q2 and Q3 at this time, gives
Coil reverse charging, electric current quickly reduces in coil, ignores tube voltage drop, the voltage u being loaded on coilAB=-U.
State 3: current stream
For the state there are two types of implementation, Q1 and Q2 is connected in one kind, and Q3 and Q4 cut-off, coil passes through Q1 and Q2 shape at this time
At continuous current circuit, electric current slowly reduces in coil；Another kind ends Q1 and Q2, Q3 and Q4 conducting, at this time coil by Q3 and
Q4 forms continuous current circuit, and electric current also slowly reduces in coil；Under freewheeling state, it is believed that the voltage for being loaded into coil both ends is uAB
=0.
By the turn-on and turn-off of above-mentioned policy control switching tube, the voltage being loaded on coil shares U ,-U, 0 three kinds of shapes
State, therefore the power amplifier of this modulation system work is known as tri-state switch power amplifier, also known as three level power amplifiers.
As shown in Fig. 2, switching signal control circuit with a central processing unit (CPU) be core, work in a fixation
Sampling period T, such as 0.0005s (20kHz sample rate).In the initial time in each sampling period, control circuit acquisition refers to
Signal and current signal are enabled, the two absolute value of the difference e, e input control algorithm unit (a usually PID controller) partially is calculated,
Generate duty cycle data kPWM0(kPWM0>0).Largest duty cycle is only to 1 (i.e. 100%), and at this time in T of entire duty cycle, H bridge is complete
When charge or discharge.Work as kPWM0>=1, amplitude limiting processing need to be made, even kPWM=kPWM0(as 0 < kPWM0< 1), kPWM=1 (works as kPWM0≥
1), using kPWMAs reality output duty ratio.Work as kPWM0>=1, although it drives H bridge not as practical control duty ratio,
kPWM0>=1 is not without meaning, it indicates the degree that current signal deviates command signal.
When e is positive value, i.e., command signal is greater than current signal, and Q1, Q4 are opened, opening state duration kPWM* T, at this time
Q2, Q3 are closed, and H bridge enters state 1, charges to coil；By kPWM* after T, Q1 is closed, and Q2 is opened, and H bridge enters state 3,
Coil current afterflow, until next sampling instant is arrived；When e is negative value, i.e. command signal is less than current signal, and Q2, Q3 are beaten
It opens, opening state duration kPWM* T, Q1, Q4 are closed at this time, and H bridge enters state 2, discharges coil；By kPWM*T
Afterwards, Q3 is closed, and Q4 is opened, and H bridge enters state 3, coil current afterflow, until next sampling instant is arrived.
It when current deviation is big, is limited by busbar voltage, uses the relevant technologies, even if charging complete cycle (or electric discharge), in T
In time, electric current is difficult to reach instruction value, then charge (or electric discharge) need persistently several periods, which has limited current changing rate,
To limit the electromagnetic force change rate of electromagnetic bearing.
It is simple to increase busbar voltage, charge/discharge speed can be increased, but directly result in the increase of power amplifier switch electromagnetic noise, shadow
Ring magnetic bearings control precision.
When magnetic bearing works normally, coil current change rate is often little, can satisfy using lower busbar voltage
It is required that；And work as load mutation or magnetic bearing working rotor near critical speed, temporary high current change rate demand is had,
At this time low busbar voltage influences electromagnetism force response rate, to influence system stability.Need to develop a kind of new power amplifier
Technology takes into account the performance requirement of electromagnetic bearing high current response speed Yu low power amplifier switch noise.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide a kind of control method of power amplifier of magnetic bearing switch, the party
Method accesses single, two or more power modules by control electronic switch, realizes the on-line tuning to power amplifier busbar voltage.
It is another object of the present invention to the control application systems for proposing a kind of power amplifier of magnetic bearing switch.
In order to achieve the above objectives, one aspect of the present invention proposes the control method of power amplifier of magnetic bearing switch, including
Following steps: the duty cycle information for obtaining H bridge driving signal is calculated according to pre-set control algorithm；By the H bridge driving signal
Duty cycle information is compared with default value, to determine the requirement of coil current response speed；It is responded according to the coil current
Rate request controls electronic switch and accesses power module, is adjusted to busbar voltage.
The control method of the power amplifier of magnetic bearing switch of the embodiment of the present invention passes through the duty ratio of H bridge driving signal
Information judges current response rate, and according to current response rate demand, real using current amplification bus switching electric source topology
Existing power amplifier busbar voltage switches in real time, and then realizes the low switch noise requirements under nominal situation to magnetic bearing switch power amplifier, with
To the demand of its high current response speed under unusual service condition.
In addition, the control method of power amplifier of magnetic bearing switch according to the above embodiment of the present invention can also have with
Under additional technical characteristic:
Further, in one embodiment of the invention, the duty cycle information by the H bridge driving signal and pre-
If numerical value is compared, further comprise: if the duty cycle information of the H bridge driving signal is greater than default value, coil electricity
It flows response speed and requires height；If the duty cycle information of the H bridge driving signal is less than default value, coil current response speed
It is required that low.
Optionally, in one embodiment of the invention, the power module is single or multiple.
Further, in one embodiment of the invention, it when the coil current response speed requires high, then controls
The electronic switch accesses multiple power modules, if the coil current response speed requires low, controls the electronic cutting
It closes and accesses single power module.
Further, in one embodiment of the invention, when accessing the multiple power module, the busbar voltage
For multiple supply voltage, required with the fast current response for meeting temporary, when accessing the single power module, the bus
Voltage is single supply voltage, to reduce power amplifier H bridge switch noise.
In order to achieve the above objectives, another aspect of the present invention proposes a kind of control application of power amplifier of magnetic bearing switch
System, comprising: computing module is used to calculate the duty cycle information for obtaining H bridge driving signal according to pre-set control algorithm；Compare mould
Block is for the duty cycle information of the H bridge driving signal to be compared with default value, to determine coil current response speed
It is required that；It adjusts module to be used to require control electronic switch to access power module according to the coil current response speed, to bus
Voltage is adjusted.
The control application system of the power amplifier of magnetic bearing switch of the embodiment of the present invention, passes through accounting for for H bridge driving signal
Sky judges current response rate than information, and according to current response rate demand, is opened up using current amplification bus switching with power supply
It flutters, realizes that power amplifier busbar voltage switches in real time, and then realize and want under nominal situation to the low switch noise of magnetic bearing switch power amplifier
It asks, with the demand under unusual service condition to its high current response speed.
In addition, the control application system of power amplifier of magnetic bearing switch according to the above embodiment of the present invention can also have
There is following additional technical characteristic:
Further, in one embodiment of the invention, the comparison module is further used for: if the H bridge drives
The duty cycle information of signal is greater than default value, then coil current response speed requires high；If the duty of the H bridge driving signal
It is less than default value than information, then coil current response speed requires low.
Optionally, in one embodiment of the invention, the power module is single or multiple.
Further, in one embodiment of the invention, it when the coil current response speed requires high, then controls
The electronic switch accesses multiple power modules, if the coil current response speed requires low, controls the electronic cutting
It closes and accesses single power module.
Further, in one embodiment of the invention, when accessing the multiple power module, the busbar voltage
For multiple supply voltage, required with the fast current response for meeting temporary, when accessing the single power module, the bus
Voltage is single supply voltage, to reduce power amplifier H bridge switch noise.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is common full-bridge type switch power amplifier H-bridge circuit topological diagram in magnetic bearing system；
Fig. 2 is the circuit structure diagram of power amplifier；
Fig. 3 is the control method flow chart of the power amplifier of magnetic bearing switch of one embodiment of the invention；
Fig. 4 is the power amplifier H bridge topological diagram that a specific example according to the present invention uses two power supplys；
Fig. 5 is the power amplifier H bridge topological diagram that another specific example according to the present invention uses three power supplys；
Fig. 6 is the control application system structural schematic diagram of the power amplifier of magnetic bearing switch of one embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The control method of the power amplifier of magnetic bearing switch proposed according to embodiments of the present invention is described with reference to the accompanying drawings
And application system, the control of the power amplifier of magnetic bearing switch proposed according to embodiments of the present invention is described with reference to the accompanying drawings first
Method.
Fig. 3 is the control method flow chart of the power amplifier of magnetic bearing switch of one embodiment of the invention.
As shown in figure 3, the control method of the power amplifier of magnetic bearing switch the following steps are included:
In step s101, the duty cycle information for obtaining H bridge driving signal is calculated according to pre-set control algorithm.
It is driven it is understood that the controller of power amplifier of magnetic bearing switch calculates H bridge according to pre-set control algorithm
The duty cycle information of signal, algorithm commonly are pid algorithms.
The duty cycle information of H bridge driving signal can be divided into two kinds, and one is kPWM, another kind is kPWM0, wherein it compares
Compared with kPWM, kPWM0Data when truncation are not carried out to controller calculated result, therefore, it can more preferably indicate that actual current is inclined
Degree from instruction current can extend the Rule of judgment range of current response rate.
In step s 102, the duty cycle information of H bridge driving signal is compared with default value, to determine coil electricity
Flow response speed requirement.
Specifically, the duty cycle information of H bridge driving signal is compared with default value, if H bridge driving signal
Duty cycle information is greater than default value, it is determined that coil current response speed requires high；If the duty cycle information of H bridge driving signal
Less than default value, it is determined that coil current response speed requires low.
In step s 103, control electronic switch is required to access power module according to coil current response speed, to bus
Voltage is adjusted.Wherein, the power module of the embodiment of the present invention can be single or multiple.
Specifically, then control electronic switch when coil current response speed requires high and access multiple power modules, if
When coil current response speed requires low, then controls electronic switch and access single power module.
Further, when accessing multiple power modules, concatenating multiple power modules is bussed supply, by promoting bus
Voltage meets temporary fast current response and requires.When accessing single power module, busbar voltage is single supply voltage,
Only single power module drives H bridge, the switching noise when work of power amplifier H-bridge circuit is effectively reduced by reducing busbar voltage.
Briefly, the embodiment of the present invention utilizes the duty cycle information of H bridge driving signal, judges coil current response speed
Demand height.When coil current response speed requires low, bus is connected using single power module, then busbar voltage is single
The switching noise when work of power amplifier H-bridge circuit can be effectively reduced in supply voltage, low busbar voltage.When judge current-responsive speed
When degree requires high, two or more power modules are sealed in by electronic switch, improve busbar voltage, to improve power amplifier response speed
Degree.
It is further illustrated below with reference to principle of the specific example to the embodiment of the present invention.
As shown in figure 4, U1, U2 voltage are respectively E1, E2 using the power amplifier H bridge topology of two power modules (U1, U2).
When magnetic bearing is in normal operating conditions, and current response rate requires low, Q5 is opened, and Q6 is closed, and E is by U1 for H bridge busbar voltage
It provides (voltage E1)；When load mutation or magnetic bearing working rotor are near critical speed, current response rate requires high
When, Q5 is closed, and Q6 is opened, and H bridge busbar voltage E is provided in series (voltage E1+E2) by U1, U2.Thereby realize normal work
Under condition, when current response rate requires low, only single power module drives H bridge, and power amplifier H is effectively reduced by reducing busbar voltage
Switching noise when bridge circuit works；When interim high current response operating condition occurs, concatenating two power modules is bussed supply, is led to
Promotion busbar voltage is crossed, meets temporary fast current response and requires.
Judge the height of current response rate demand, the duty cycle information k of H bridge driving signal can be passed throughPWM.CPU according to
Specific control algolithm (usually pid algorithm) calculates kPWMWhen, if kPWMLess than certain numerical value (such as: 0.5), i.e., it is believed that electricity
It is low to flow response speed requirement, can only access a power module at this time；If kPWMMore than or equal to certain numerical value (such as: 0.5),
I.e. it is believed that current response rate requires height, it can access two power modules at this time.
Judge the height of current response rate demand, the duty cycle information k of H bridge driving signal can also be passed throughPWM0.It compares
In kPWM, kPWM0It is data when not carrying out truncation to controller calculated result, it can more preferably indicate that actual current deviates instruction
The degree of electric current.The Rule of judgment range (can work in the data area greater than 1) of current response rate can be extended, for example,
kPWM0Less than 2, it is low to be considered as current response rate requirement, kPWM0More than or equal to 2, it is high just to think that response speed requires.
Use kPWM0, after the acquirement of Rule of judgment range is wider, the further stepping of response speed can also be introduced more
Power module realizes more flexible busbar voltage configuration.For example divide basic, normal, high shelves, three power modules are introduced, k is worked asPWM0< 1,
It is judged as low-response speed requirement, accesses single power supply；1≤kPWM0< 2, it is judged as middle response speed demand, accesses two electricity
Source；kPWM0>=2, it is judged as high response speed demand, accesses three power supplys.
As shown in figure 5, using (U1, U2, U3 when three power supplys；Voltage is respectively E1, E2, E3), when magnetic bearing is in just
Normal working condition, when current response rate requires " low ", Q5 is opened, and Q6, Q7, Q8 are closed, and H bridge busbar voltage E provides (electricity by U1
Pressure is E1)；When current response rate require " in " when, Q5, Q8 close, Q6, Q7 open, H bridge busbar voltage E by U1, U2 connect
It provides (voltage E1+E2)；When current response rate require "high" when, Q5, Q6, Q7 close, Q8 open, H bridge busbar voltage E by
U1, U2, U3 are provided in series (voltage E1+E2+E3).
It needs to seal in more multi-power module, equivalent current supply topological modification can be carried out.
To sum up, the control method of the power amplifier of magnetic bearing switch proposed according to embodiments of the present invention, at magnetic bearing
Coil current response speed is judged by the duty cycle information of H bridge driving signal in normal operating conditions, when current-responsive speed
When degree requires " low ", with lower busbar voltage driving switch power amplifier, power amplifier H bridge switch noise is effectively reduced；When load be mutated,
Or magnetic bearing working rotor when current response rate requires "high", temporarily seals in more multi-power module, mentions near critical speed
High busbar voltage meets temporary fast current response and requires.That is, by introducing the real-time handoff functionality of busbar voltage,
The low switch noise requirements under nominal situation to magnetic bearing switch power amplifier have been taken into account, speed is responded to its high current under unusual service condition
The demand of degree.
Referring next to the control application for the power amplifier of magnetic bearing switch that attached drawing description proposes according to embodiments of the present invention
System.
Fig. 6 is the control application system structural schematic diagram of the power amplifier of magnetic bearing switch of one embodiment of the invention.
As shown in fig. 6, the control application system 10 of the power amplifier of magnetic bearing switch includes: computing module 100, compares
Module 200 and adjustment module 300.
Wherein, computing module 100 is used to calculate the duty cycle information for obtaining H bridge driving signal according to pre-set control algorithm.
Comparison module 200 is for the duty cycle information of H bridge driving signal to be compared with default value, to determine that coil current responds
Rate request.It adjusts module 300 to be used to require control electronic switch to access power module according to coil current response speed, to mother
Line voltage is adjusted.Wherein, power module is single or multiple.The system 10 of the embodiment of the present invention passes through control electronic cutting
It closes, accesses single, two or more power modules, realize the on-line tuning to power amplifier busbar voltage.
Further, in one embodiment of the invention, comparison module 200 is further used for: if H bridge driving signal
Duty cycle information is greater than default value, then coil current response speed requires high；If the duty cycle information of H bridge driving signal is less than
Default value, then coil current response speed requires low.
Further, in one embodiment of the invention, when coil current response speed requires high, then electronics is controlled
Switch accesses multiple power modules, if coil current response speed requires low, controls electronic switch and accesses single power supply mould
Block.
Further, in one embodiment of the invention, when accessing multiple power modules, busbar voltage is multiple electricity
Source voltage is required with the fast current response for meeting temporary, and when accessing single power module, busbar voltage is single power supply electricity
Pressure, to reduce power amplifier H bridge switch noise.
It should be noted that the explanation of the aforementioned control method embodiment to power amplifier of magnetic bearing switch is also fitted
For the system, details are not described herein again.
The control application system of the power amplifier of magnetic bearing switch proposed according to embodiments of the present invention, when magnetic bearing is in
Normal operating conditions judges coil current response speed, works as current response rate by the duty cycle information of H bridge driving signal
It is required that with lower busbar voltage driving switch power amplifier, power amplifier H bridge switch noise is effectively reduced when " low "；When load mutation, or
Magnetic bearing working rotor when current response rate requires "high", temporarily seals in more multi-power module near critical speed, improves
Busbar voltage meets temporary fast current response and requires.That is, by introducing the real-time handoff functionality of busbar voltage, it is simultaneous
Cared for the low switch noise requirements under nominal situation to magnetic bearing switch power amplifier, under unusual service condition to its high current response speed
Demand.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of control method of power amplifier of magnetic bearing switch, which comprises the following steps:
The duty cycle information for obtaining H bridge driving signal is calculated according to pre-set control algorithm；
The duty cycle information of the H bridge driving signal is compared with default value, to determine that coil current response speed is wanted
It asks；And
It requires control electronic switch to access power module according to the coil current response speed, busbar voltage is adjusted.
2. the method according to claim 1, wherein the duty cycle information by the H bridge driving signal with
Default value is compared, and further comprises:
If the duty cycle information of the H bridge driving signal is greater than default value, coil current response speed requires high；If described
The duty cycle information of H bridge driving signal is less than default value, then coil current response speed requires low.
3. the method according to claim 1, wherein the power module is single or multiple.
4. method according to claim 1 to 3, which is characterized in that when the coil current response speed requires high, then
It controls the electronic switch and accesses multiple power modules, if the coil current response speed requires low, control the electricity
Sub switch accesses single power module.
5. according to the method described in claim 4, it is characterized in that, the bus is electric when accessing the multiple power module
Pressure is multiple supply voltage, is required with the fast current response for meeting temporary, when accessing the single power module, the mother
Line voltage is single supply voltage, to reduce power amplifier H bridge switch noise.
6. a kind of control application system of power amplifier of magnetic bearing switch characterized by comprising
Computing module, for calculating the duty cycle information for obtaining H bridge driving signal according to pre-set control algorithm；
Comparison module, for the duty cycle information of the H bridge driving signal to be compared with default value, to determine coil electricity
Flow response speed requirement；And
Module is adjusted, for requiring control electronic switch to access power module according to the coil current response speed, to bus
Voltage is adjusted.
7. system according to claim 6, which is characterized in that the comparison module is further used for:
If the duty cycle information of the H bridge driving signal is greater than default value, coil current response speed requires high；If described
The duty cycle information of H bridge driving signal is less than default value, then coil current response speed requires low.
8. system according to claim 6, which is characterized in that the power module is single or multiple.
9. according to system described in claim 6-8, which is characterized in that when the coil current response speed requires high, then
It controls the electronic switch and accesses multiple power modules, if the coil current response speed requires low, control the electricity
Sub switch accesses single power module.
10. system according to claim 9, which is characterized in that when accessing the multiple power module, the bus electricity
Pressure is multiple supply voltage, is required with the fast current response for meeting temporary, when accessing the single power module, the mother
Line voltage is single supply voltage, to reduce power amplifier H bridge switch noise.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894979A (en) * | 2020-07-29 | 2020-11-06 | 南京邮电大学 | Multi-bridge arm switch power amplifier circuit with fault-tolerant function |
| CN112145553A (en) * | 2020-09-22 | 2020-12-29 | 珠海格力电器股份有限公司 | Magnetic suspension bearing system, control method and device thereof and storage medium |
| CN112833097A (en) * | 2020-11-27 | 2021-05-25 | 中国航发四川燃气涡轮研究院 | Integrated digital control method for electromagnetic bearing based on generalized control mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111894979A (en) * | 2020-07-29 | 2020-11-06 | 南京邮电大学 | Multi-bridge arm switch power amplifier circuit with fault-tolerant function |
| CN112145553A (en) * | 2020-09-22 | 2020-12-29 | 珠海格力电器股份有限公司 | Magnetic suspension bearing system, control method and device thereof and storage medium |
| CN112833097A (en) * | 2020-11-27 | 2021-05-25 | 中国航发四川燃气涡轮研究院 | Integrated digital control method for electromagnetic bearing based on generalized control mode |
| CN112833097B (en) * | 2020-11-27 | 2022-09-20 | 中国航发四川燃气涡轮研究院 | Integrated digital control method for electromagnetic bearing based on generalized control mode |
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